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W. E. DE VOE.

UNDERFEED FURNACE.

APPLICATION FILED NOV. 5, I920- 1,401,888 Patented Dec. 27, 1921.

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W. E. DE VOE.

UNDERFEED FURNACE. APPLICATION mcu NOV- 5. 1920.

Patented Dev. 27, 1921.

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UNDERFEED FURNACE.

APPLlCATlOt-l FILED NOV- 5. 1920.

1,401,888, Patented Dec. 27, 1921.

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'WIIJIIAH E. DE V03, OF DETROIT, MICHIGAN, ASSIGNOB 1'0 THE UNDESTOKE!!- COMPANY OF AMERICA, 03 DETROIT, MICHIGAN, A CORPORATION 01'NEW' JERSEY.

UNIDEMEED FURNACE.

Specification of Letters Patent.

Patented Dec. 27, 1921.

To all whom. it may concern:

Be it known that I, WILLIAM E. De Von, a citizen of the United States,residing at Detroit, in the county of Wayne and State of'Mich' an, haveinvented certain now and useful in rovements in Under-feed Furnames, ofw ich the following is a specificatron.

My invention, pertaining-to under-feed fiirnuces, relates moreerticularly to stokeis of the single-retort, literal-dumping type havingloterall y-tiltablc floor-sections, end it has for its ob ects toimprove the operation of such stokers for some urposes, and to providesimple, rugged unc efiective met-ho.- nism for operating thetiltingloor-scctions.

In the patents of Arthur Blackburn and Frank E. Fleming, No. 1,826,906and No. 1,364,237 there are shown different forms of tilts lefloor-sections of a furnace of the t e referred to, and for illustrativepur oses show my present invention a plie to a. stoker of constructionlike appucation Serial No. 262,252 as to its fircox floor. Thisfurnace-construction in general being now well known, illustration anddc scription thereof may be abbreviated.

In the drawings l'igure l is a front clevation with parts in section ofthe furnacefront; Fi 2 is a cross section through tho fire-box oor,showing normal posit-Lon of the tilting parts; Fig. 3 is a similar viewshowing operutin positions or" such parts; Fifi l 4 is general 3 alongitudinal section wit zones broken to different planes, the centralportions being illustrated in a plum: slightly to the right ofindex-lins *1l of Fi 1, and the extreme portions being bro on to lanesto the left of said indexline, and igs. 5 and 6 are fragmentary details.

In the type of stoker shown, fuel from hopper 10 is fed by c suitablerum in casing 11 through throat 12 in the furnace-frontwsll 13 into alongitudinal central retort l-l extendin back to the bridge-well 16 withits mout horizontal; this retort having alongside of it, on one sidethereof, two courses or series of laterally tiltnblc floorclements 16and 17 arranged in tandem laterally and pivoted us at 13, 1.)respectively, along their outer edges so that their inner ed s may beelevated to feeding, or load-unflinching angle. In normal posltiou thesesections form part of the fire-box floor,

downsloping from the retort to substantially a line of juncture with theash-dump gate 20, that is pivoted alon its inner ed as at 2.1. u on apartition-we structure which divlc es the ssh pit 23 from thewind-chemher 24 below the floor. Advantageously each inner floor-section16 has an extension 16 disposed to form a lip portion or extension ofthe retort 14, the body 14" of which is rigid, such hp being providedwith twyers 25, and each of the tiltnble floor elements is provided witha skirt of arcuate section, as at 16", 17" respectively, for knownpurpose. Of course the arts thus described, a purtenant to one side ofthe retort, are uplicated on the other, and so for as distinctivereference may be requisite those parts to the left, Fig. 1, will beidentified by the prime-mark It will be understood that I do not hereinclaim the construction so far described per so, nor do I lnmt myinvention specifically thereto, as other specific structures involvingtwo series of laterallytiltable floor elements disposed in tandemcourses. and pivoted along their outer edges are known, and in operatingmechanism may be applied t wrote.

I provide, novell for tilting the two tandem courses of oar-sectionssingly and alternately to cause the series of inner elements 16 to riseto its evalanching angle while the series of elements 17 is in normalposition of rest, and vice verse; and I socom lish the result by meansas follows: Eac tiltable element has near its inner edge o. pivot pin 26or 27, and On these mspectivcl act the upper ends of links 28 and 29.3h: lziinkshhsve at their llower ends pivot ms 1 t at ectivc a e ooiiite cnds of a rocl n' f lever il d tlmfiirc of suflicient length a toengage and bear in saddles 34 and 35 of brackets 36 r' idly mounted atintervals on wall 22. I one rocks the lever 32 clockwise, outer pin 31sets on saddle 35 as o. fulcrum, pin 32 rising from its 0 en saddles andelevotin link 28, which pus cs 11 the inner ed of he floorelement 16.unterclockwise rocking of the lever 32 reverses this in 30 remainingseated in its saddle (and cor elements 16 remaining in normal position)while outer link 19 and the inner edge of floor elements 17 are raised.

To rock the levers 82 for all those mechamcnts of the shafts incident tothe described rocking-action. Thus, Fig. 1, the two shafts are connectedfor engine-impelled operation in unison. the two sha'its having fixedthereto levers or crank-arms 41, 41 for rocking; them, these levershaving their power-ends connected with respective links 42, 42' that arepivoted also to the lower and upper arms of a centrally pivoted lever48, mounted on the furnace front. The shaft 40 extends through akeyhole-a erturc 4:5 (Fig. 5) in the front wall, shape to give requisiteclearance, and on the shaft is mounted a cover plate 46 pressed againstthe front wall by spring 47, to cover the o cning 45. Of course, owermay be npplie to any suitable point 0" the exterior lever system, andspecifically 50 represents an extension arm of lever 41', connected bypivoted link 51 to the iston rod 52 of a suitable reciprocating engine53 suitably mounted on the boilerfront. in operation, as piston rod 52reciprocutes both levers 41, 41' are rocked between dotted-linepositions. Each such lever TOPICS lever 32 or 32, shaft 40 or 40 movingbodily as lever 32 or 32' tilts alternately on its two saddles or'fiulcrn. Consequently one series of floor elements, as 16, rocks whileits companion series 17, rests, or vice verse.

I claim:

1. The combination with an underfecd Stoker comprising a retort and twolaterallytiltable floor-elements arranged slon one side of the retort,each said element lacing pivoted adjacent one edge, of reciprocatablemeans for rocking said elemen s singly and alternately comprising arockin lever, two spaced fulcro therefor, means %or rocking said leveron sold fulcra alternately, and connections from said lever to thetiltable elements.

2. In a device of the character described, :1 retort, two tiltablefloor-elements arranged laterally beyond the retort, each pivoted alongone edge, a rocking lever, two fulcra therefor, means for rocking saidlever on its fulcra alternately and links, connected with the free edgesof the floor-elements and with points on said rocking lever adjacentsaid :tulcm.

3. The combination with an underfeed stoirer comprising a. retort andtwo laterallytiltable floor-elements laterally beyond the retort, eachsaid element being pivoted adjccent one edge, of two operating linksconnccted with the free edges of the rcspective floor-elements, anoperating lever-"connected at. opposite ends to the two operating linksand having fuicra on which it may rock adjaccnt its opposite ends, andmeans for rockmg said lever.

4. The combination with a furnace having a. front having a shaft 0Jening, a longitudinal retort and two tiltable floor-elemerits arrangedin tandem at one side of the retort, each said element being ivoted nearits outer edge links respective y connected with the free inner edges ofthe said members, a roclrim lever to which said links are connected, andtwo saddles on which said lever may rock, adjacent the twolink-conncctions, a shaft for rockin said lever, extending freelythrough said shaft-opening in the furnace front and hodily movabletherein, and an engine outside of the furnace for actuating said shaft.

5. The combination with a furnace having a from; having a. shaftopening, a longitudinal retort and two tiltahle floor-elements arrangedin tandem to one side of the retort, each said element bein tiltablenear its outer edge, links respective y connected with the free inneredges of the said-members, a rocking lever to which said links areconnected, and two saddles on which said lever may rock, adjacent thetwo link-connections, a shaft for rockin said lever, extending freelythroughsai shaft-opening in the furnnoe front and bodily movabletherein, a cover plate for said shaft-opening carried by the shaft, andan engine outside of the furnace for actuating said shaft.

WILLIAM E. DE VOE.

